A music snob listens to more music than you. As a result they are able to make a better informed judgement on what music is best as they have listened to a wider spectrum of styles. They spend their spare time digging around for music that they perceive to be better than what has been spoon fed to them by the radio. This allows them to hear music that doesn't get credited by major media sources and so aids them in making a better judgement on what music is better.

Often dismissed by others as only liking music on the basis that it is obscure, skeptics of music snobs often choose to make this misinformed judgement because they don't understand the appeal of finding out about less mainstream music. In reality the music snob will prefer less mainstream music solely because it is more original and sounds better.

person 1: "you're such a music snob, you only like music because no one else has heard of it"

Music snob: "Actually I like the music I like because it sounds better and I have spend a lot of time and effort looking for music. It's like looking into a treasure chest. You will pick something from the top and say that it's fantastic, where as I will empty the entire chest, sift through everything and choose only the finest treasure. See what I mean?"

A person who believes s/he has a more refined taste in music and has much more knowledge in the field of music in general. Every song and genre is unacceptable unless the snob happens to like it, then it is absolute perfection. Music snobs feel obligated to enlighten everyone with unwelcome critiques and irrelivant musical trivia.

Person 1: That asshole turns her nose up at anything that isn't part of her narrow, carefully hand picked library of music.
Person 2: Music snob?
Person 1: Definitely.

An especially irritating breed of tool, the music snob is a self described authority on what is or is not "good" music. The genre is irrelavant, as music snobs somehow confuse their subjective opinions with objective concrete facts across all genres of music. The music snob is quick to write off your taste in music, and often spout proudly a large number of "better" unknown and/or less "commercial" bands that if you had as good of taste as they did, you would already know about and love. The music snob can be found at low budget local record stores, probably arguing with a clerk about how no good bands cds are for sale. The music snob often prides themselves on their, again, self described "non-conformist" interests, and everyone else is merely a braindead product of MTV. The music snob fails to realize the definition of the word opinion: 1. a belief or judgment that rests on grounds insufficient to produce complete certainty.
2. a personal view, attitude, or appraisal., and instead dilludes themselves into thinking that their opinions are more valid than those of anyone whos differ.

Music Snob: Oh my god, is that (insert band here), they suck, they are totally (insert bizzare music sub-genre) not real (insert music genre). If you werent such a sheep youd listen to (insert 1, to an indefinate number of obscure/unpopular bands).

Person#2: Wow you are one annoying faggot ass music snob, why dont you go choke on a dick and die while listening to (insert a likely crappy band they mentioned) you ass sucking bitch fuck.

A specimen that is prone to be of high levels of irritance to the normal person. In general, they hold the belief that their musical taste and their musical taste alone is relevant while anyone who has opposing or different opinions on music is considered stupid and won't hesitate to spew snotty remarks at you. These people are often pretentious poseurs who always make an ass out of themselves as they claim to be "non-conformist" for listening to indie bands with quirky names who have song titles that are at least ten words in length. The funny thing is, is that they don't realize that they are actually the biggest conformers out there for listening to, or claiming to listen to certain bands or genres in order to fit into a certain scene or gain some cred.

Generalizations aside, they are the Adolf Hitlers of music and if you don't like the exact same music they do, they will cut you down in ridiculous ways for having a different opinion and it often leads to broken friendships. If you find that you are friends with a music snob, do yourselves a favor and just cut them loose right away. It'll save your fist from being hit by their face when they find out you listen to mainstream. There are some who will even criticize others for not being as pedantic about music or a band as they are or even simple things as to why you are interested in the artists you like.

General music snob: Excuse me? You listen to Britney Spears? That's not real music; that's manufactured crap! Try listening to real music like Suzie Crotchrocket and the Breast Rashes!

Pretentious poseur: All the bands I listen to are known by fewer than 100 people and you can't find their albums in stores, so that totally means I have a better taste in music than everyone! I'm so HxC!

Know-it-all: Unless you read the liner notes of every album, read all of their biographies, know all the words to their released and unreleased songs by heart AND look up every possible bit of information on the band as soon as you hear about them on the internet like I do, you don't deserve to call yourself a fan of music! Hmph!

someone who thinks they are the biggest fan of a band and if someone doesn't know everything about the band they are not true fans.

Susie: i love this song and i really like this band.
Billy: yeah? bet you didn't know that the bassest has 15 letters in his full name and hates pickles. you don't understand them like i do.
Susie: Damn music snob.